from flask import render_template, current_app, request, jsonify, g

from info03 import constants
from info03.models import News, Category
from info03.utils.common import user_login_data
from info03.utils.response_code import RET
from . import index_blu


@index_blu.route('/')
@user_login_data
def index():
    # 获取点击排行
    news_list = None
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS).all()
    except Exception as e:
        current_app.logger.error(e)

    click_news_list = []
    for news in news_list if news_list else []:
        click_news_list.append(news.to_basic_dict())

    # 获取新闻分类数据
    categories = Category.query.all()
    # 定义列表保存分类数据
    categories_dict = []

    for category in categories:
        # 拼接内容
        categories_dict.append(category.to_dict())

    data = {
        'user_info': g.user.to_dict() if g.user else None,
        'click_news_list': click_news_list,
        'categories': categories_dict
    }

    return render_template('news/index.html', data=data)


@index_blu.route('/newslist')
def get_new_list():
    """
        获取指定分类的新闻列表
        1. 获取参数
        2. 校验参数
        3. 查询数据
        4. 返回数据
        :return:
    """

    # 1.获取参数
    args_dict = request.args
    page = args_dict.get('page', '1')
    per_page = args_dict.get('per_page', 10)
    category_id = args_dict.get('cid', '1')

    # 2.校验参数

    try:
        page = int(page)
        category_id = int(category_id)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    # 3.查询数据并分页
    filters = [News.status == 0]
    # 如果分类id不为1，那么添加分类id的过滤
    if category_id != 1:
        filters.append(News.category_id == category_id)
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
        # 获取查询出来的数据
        news_list = paginate.items
        # 获取到总页数
        total_page = paginate.pages
        current_page = paginate.page
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='数据查询失败')
    news_dict_li = []
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())
    data = {
        'total_page': total_page,
        'current_page': current_page,
        'news_dict_li': news_dict_li
    }
    # 4.返回数据
    return jsonify(errno=RET.OK, errmsg='OK', data=data)


@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')